Duramax lly electrical problem at ficm - YouTube Click to view on Bing1:35Duramax lly electrical problem at ficm Djdross. Loading.. Unsubscribe from Djdross? LLY Duramax injector control circuit misfire cyl 7 cyl 2 pigtail ice pick fix - Duration: 2:23.Author: DjdrossViews: 25K LB7: Ficm problems??? [Archive] - Duramax Diesels Forum 2 step determines if a wiring or injector problem caused this DTC to set. If DTC P1262 sets alone, an internal FICM fault is the cause. DTC P1262 Step Action Yes No Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Control Module Connector End Views or Engine Controls Connector End Views 1 FICM Harness Diagram needed 2002 - Chevy and GMC Duramax 01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . FICM Harness Diagram needed 2002. I am in need of the wiring harness diagram for the FICM . I am looking for some theroy and operation on a 2002 I am looking for some theroy and operation on a 2002 duramax. (FICM), that meters pressurized fuel to a single engine cylinder. The fuel injectors are located under the rocker covers. The ECM energizes the low-impedance injector solenoid to open a normally closed valve. 2003 & 2004 MEDIUM DUTY C SERIES ELECTRICAL PDF fileLB7 Duramax 6600 Diesel 2 LG4 Duramax 7 Diesel 3 LG5 Caterpillar 7 Diesel 3 FACTORY INSTALLED EQUIPMENT The UF3 fast idle option includes the Fast Idle Switch, the Fast Idle Indicator Lamp and necessary wiring to the ECM for operation. • Fast Idle Switch - Use to increase Engine speed to a preset value.